(7)The legally binding requirements applicable to CCPs authorised by the CFTC include high-level standards that are set out by the core principles for DCOs contained in section 5b(c)(2) of the CEA and Subparts A and B of Part 39 of the CFTC Regulations. To be authorised by the CFTC, all CCPs must comply with those core principles. The core principles are complemented by specific enhanced risk management standards applicable to DCOs which have been designated by the Financial Stability Oversight Council of the USA as systemically important and for which the CFTC has been designated as the supervisory agency (‘SIDCOs’). The enhanced risk management standards are set out in Subpart C of Part 39 of CFTC regulations (Regulations 39.30 to 39.42). The high-level standards and the specific enhanced risk management standards for SIDCOs (together, the ‘primary rules’) are applicable to SIDCOs and to DCOs which have not been designated as SIDCOs but have voluntarily opted to be legally bound by those specific risk management standards (‘opt-in DCOs’). Those primary rules comprise the first tier of the legally binding requirements applicable to DCOs.